172

CHIRONOMIDAE (DIPTERA) FROM WESTERN CAPE PROVINCE-IV.

By PAUL FREEMAN, M.Sc., F.R.E.S. (British Museum, Natural History.)

PARTS 1-111 cf this series were published in Volumes 22-23 of these Proceedings. Reference to Part I (22: 127-135) should be made for details of localities, collectors and terms used. This is the last part of the series and deals with new species collected by Dr. K. M. F. Scott since the work was started.

Pentaneura trifascia sp. n. Thorax with cross-banded appearance as in P. tricolor Goetghebuer, but i t is easily

distinguished by absence of dark rings on legs ; wing markings more or less in three cross bands.

Female.-Wing length 24’5 mm. Head and mouthparts brown, antennae more yellow. Thorax reddish brown, pruinose,

with a darker transverse central band; hairs pale. Legs yellowish, femora darkened subapically. Wings (fig. l la) densely covered with pale macrotrichia, dark macrotrichia present as shown to form a pattern more or less as three transverse bands, extreme apex pale ; halteres white. Abdomen brown, apices of segments pale.

Holotype female and 1 paratype, Tulbagh Barrage, 17. xi. 63.

Pentaneura octomaculata sp. n. A small brown species with eight well marked spots of dark macrotrichia on each wing ;

Female.-Wing length 2.0 mm. Head yellowish brown, mouthparts slightly darker, eyes bare, antennae 12-segmented.

Thwux pruinose, scutal stripes brown end separate; intervening lines, shoulders and prescutellar area pale, scutellum whitish yellow, postnotum and pleura dark brown. Legs uniformly translucent, unmarked, L.R. 0.75. Wings pale, densely clothed with brown macrotrichia, with black macrotrichia forming eight distinct spots as follows : one over the r-m cross vein where the membrane is distinctly darkened, two in cell R, placed at one- third and two-thirds of its length, two in cell MI more or less below the previous two, one over the apex of Cu and two in the anal cell ; in addition there are dark hairs along both branches of M and An. Halteres whitish. A b h e n dark brown with pale hairs, apical margins of segments translucent.

legs plain.

Holotype female and 4 9 paratypes, Bergvliet, 12. ii .53.

Anatopynia unicolor sp. n. This species does not fall readily into any of the described genera but its

characters are not sufficiently well defined for the erection of a new genus. The produced costa and venation generally suggest Anatopynia, but the pro- thorax and general appearance are more like Pentanezira, whilst the suppression of the postnotal furrow is a character of the Podonominae. On balance I consider it falls best into A ~ o p y n . i a , which is a genus without described

PROC. R. ENT. SOC. LOND. (B) 23. PTS. 9-10 (OCT. 1954).

Mr. Paul Freeman on Chironomidae (Dipteru) 173

African species, although there are specimens of two undescribed species in the British Museum.

A small dark insect without any markings, postnotal furrow almost absent, pulvilli

Mule.-Wing length 2.0 mm. Head blackish, palpi rather short, eyes bare, dorsal narrow portions present, antennae

with well developed plumes, A.R. 1.0. Thorax black, pruinose, prothorax somewhat reduced, more like Pentaneztra, scutellum brown, postnotum with reduced longitudinal fissure just distinguishable under high power. Legs brown, unmarked, L.R. 0.75, p u l d l i absent, empodium well developed and long. Wings unmarked, densely covered with macrotrichia over most of their surface ; costa produced, reaching nearly half way to M, Rz+, well developed and forked, r-m long. Halteres yellow. Abdomen uniformly Clark, hypopygium normal, styles simple, tapered with a single apical spine.

absent, costa produced, r-m rather long, hypopygium normal.

Holotype male, Berg River, Assega,ibos Waterfall, 23. xii .52.

Metriocnemus capensis sp. n. The male is small and blackish, the female yellowish brown ; A.R. about 0.25, L.R. 1.0,

costa strongly produced, halteres pale ; readily distinguished from M . scotti Freeman and de?oul$ Goetghebuer by the shortness of the anal point, low A.R. and high L.R.

MaJe.-Wing length 1-4 mm. Head mouthparts and antennae blackish, eyes normal without dorsal spur, last antenna1

segment short so that A.R. is only about 0.25. Thorus entirely blackish brown, slightly pruinose. Legs brown ; L.R. of front legs practically 1.0, of hind legs 0.6, pulvilli absent, empodium well developed. Wings with a brownish tinge, clothed over most of the surface with macrotrichia which are absent only from the anterior part of the basal third ; costa strongly produced reaching half way to M, Rz+, ending about midway between R, and R,,,, the latter ending above M,+, ; stem vein and squama each with a single hair. Halteres pale. Abdomen dark brown, hypopygium (fig. l l b ) with extremely short anal point (shown black in figure), coxal lobe moderately developed, style with inner expansion and single apical spine.

Female.-Much paler than male, yellowish brown, scutal stripes only vaguely indicated, wing maorotr4chia denser.

Holotype male and 6 3, 9 9, paratypes, Berg River, Assegaibos, 8.v.53 ; 2 9 same locality, 30. vii .52 ; 2 $, 1 9, Berg River, Assegaibos Stream, 14. viii .53.

Cricotopus bergensis nom. nov. Cricotopua ungustua Freeman, 1953, Proc. R. ent. SOC. Lmd. (B) 22 : 132, nec Goetghebuer,

When Goetghebuer described the Palaearctic species C. angustus he gave Verrall as the author because the latter had used it as a MS. name. Goetghebuer gave no indication that the description had not previously been published and the name was omitted from the Zoological Record and so from my card catalogue as well.

1927, Ann. Bull. SOC. ent. Belge 07 : 52.

Orthocladius reductus sp. n. This species belongs to Edwards’ group D (Dactylocladius Kieffer). It is

separated from other species of the group by the bilobed terminal antenna1 segment, flattened fifth tarsal segment, and extremely short anal point. As

174 Mr. Paul Freeman on Chironomidae (Diptera)

stated by Edwards, species of this group show some resemblance to species of Nanocladius (Eukieferiella).

This seems to be correlated to some extent with size ; the smaller specimens have a very low A.R. and an obtuse lobe ; in the larger specimens A.R. may be as much as 0.8 and the lobe slightly produced, also the plumes are better developed.

The antenna1 ratio and size of wing lobe are both highly variable.

b

FIG. 11.-(a) Wing of Pentaneura trifascia. (b)-(i) Male hypopygia . (b) Metrwcnemw capensis ; (c) Orthocladius reductus ; (d) Smattia atra ; (e) Pseudosmittia conigera ; (f) Cryptochironomus ater ; ( g ) C. stilifer ; (h) C. reductus ; (i) C. atrofasciatus.

The hypopygiuni, wing venation, and leg structure are identical in all specimens and intermediate stages of A.R and wing lobe are present in the series examined; I am therefore treating them as belonging to the same species.

Male.-Wing length 1.5-1.6 mm. Head brownish black, mouthparts and antennae black, A.R. variable from 0.254.8,

from Western Cape Province-I V 175

plumes scanty and not very long, last segment slightly clubbed and with short hairs, bilobed aa in Nanoeludius biloba Freeman (fig. 5h). Thorax black, slightly shining, stripes more or less fused, shoulders pale, scutellum brown. Legs dark brown, L.R. about 0.8, pulvilli present aa short rounded pads, empodium long, last tarsal segment flattened. Wings tinged with brownish, without distinguishable microtrichia. Costa slightly produced, R,+, close to R4+6 for most of its length but ending separately in the costa about two-thirds distance between R, and R4+6; posterior fork well distal to r-m, Cu straight, An ending about opposite fork ; lobe obtuse or slightly produced, squamal fringe of 3-5 hairs. Halteres brown. Abdomen black, hypopygium (fig. l l c ) with extremely short anal point, coxa narrow, lobe well developed but not free.

F e m a k S i m i l a r to male, antennae short. In some specimens stripes separate, ground colour of thorax pale.

Holotype male and 5 $, 4 52, paratypes Berg River, Assegaibos, 8.v.53 (all males with low A.R.) ; 3 3, 3 9, Berg River, Driefontein, 14.viii.53 and 1 9, 20.viii .53 ; 1 $, Berg River, Groot Drakenstein, 26.viii.53 ; 2 3, 1 0, Berg River, Assegaibos Stream, 14. viii. 53.

Nanocladius Icieffer. Nanocladius Kieffer, 1913, Voy. Alluaud Jeanne1 Afr. Or. Ins. Dipt. 1 : 31. Eukiefferiella Thienemann, 1926, Arch. Hydrobiol. 17 : 325, syn. nov. Microcricotopus Thienemann and Harnisch, 1932, Zool. Ans. 99 : 137, syn. nov.

This genus was erected to include an East African species N . vitellilziis Kieffer based on a single female from Kilimanjaro. I have been able to examine this specimen now in the Museum National d’Histoire Naturelle, Paris, and I have found it to be a typical Microcricotopus. Nanocladius is the earlier name and therefore Microcricotopus falls as a synonym and the genus must be known as Nanocladius with Eukiefferiella as a subgenus.

Nanocladius (Nanocladius) brunneus sp. n. A small insect distinguished from N. niveipluma Freeman by the yellow brown thorax

Male.-Wing length 1-0 mm. Head yellowish brown, palpi and antennae dark brown, plumes dark, A.R. about 0.3,

apical segment slightly clubbed and with about 10 short, only slightly curved hairs a t the apex, not in the form of a rosette; eyes densely hairy. Thorax yellowish with brown stripes, postnotum and sternopleuron dark brown. Legs brown, pulvilli present, L.R. 0.6. Wings similar to N. niveipluma. Halteres yellowish brown. Abdomen dark brown, hypopygium essentially similar to N. niaeiplumu, anal point slightly shorter but this may be variable.

and shorter hairs a t apex of antenna, the plumes of which are dark.

Holotype male and 1 $ paratype, Berg River, Driefontein, 14.iv.53.

Smittia atra sp. n. Very similar to S. nigra Freeman, distinguished by larger size, pubescent eyes and by

the male hypopygium ; anal angle of wing slightly less obtuse, empodium well developed. Male.-Wing length 1.8 mm. Head, mouthparts, antennae black ; A.R. about 1.5, eyes clearly pubescent. Thorax

Legs brown, L.R. 0.6, pulvilli absent, Wings milky, venation very similar to S. nigra, anal angle

Abdomen blackish brown ; hypopygium (fig. l l d )

black, slightly shining and with some pruinosity. empodium well developed. better developed. Halteres dark brown.

176 Mr. Paul Freeman on Chironornidae (Diptera)

with bare anal point, IXth tergite with a few hairs, lobe of coxite slightly developed, style with inner flange.

Female.-Wing length 1.4 mm. Similar to male, distinguished from female of S. nigru by pubescent eyes.

Holotype male and 4 9 paratypes, Berg River, Cecilia’s Drift, 28.iv .53 ; 1 9, Bergvliet, 7.v.53 ; 1 9, Berg River, Wellington, 28.iv.53. ’

Pseudosmittis conigera sp. n. Entirely black or dark brown, posterior fork rather wide, Cu slightly bent, An short.

MuZe.-Wing length 1.5 mm. Head, mouthparts, antennae black, A.R. about 1.6, eyes bare,

Readily distinguished from P. capicola Freeman by the long last antenna1 segment.

Thorus black, slightly shining and pruinose. pulvilli absent, empodium well developed. Wings milky; costa not produced, E2+3 reaching costa near apex of R4+5, which is longer than in P. cupicolu but still slightly short of M,+4 ; posterior fork fairly short and wide, Cu slightly bent, similar to P . capicolu, -411 not reaching the fork; anal lobe well marked and produced. Halteres black. Abdomn blackish, hypopygium (fig. l l e ) with widely conical and short anal point, IXth tergite and point with scattered hairs, style rather foreshortened in the figure with slight inner flange.

Legs dark brown, L.R. 0.5;

Holotype male, Berg River, Piquetberg, 27. iii .53 ; paratypes, 1 $, Stellen- bosch, 5.ii.53 ; 1 $, Clanwilliam, 6.xii.52 ; 1 $, Platteklip Gorge, 22.i.53.

Chironomus (Cryptochironomus) ater sp. n. Totally black except for four posterior tibiae and tarsi which are mainly yellowish,

Distinguished from C. Zeucopus Kieffer by the black anterior tarsi and the more hairs pale. elongate style.

MuZe.-Wing length 2.75 mm. Head, mouthparts and scape black, flagellum brown, plumes black, A.R. about 3.25,

frontal tubercles absent. Legs black except for middle and posterior tibiae and tarsi which are yellowish, darkened at the ends of the segments, though in one specimen the tarsi are mainly black ; hairs pale ; last tared segment on all legs flattened, pulvilli large, anterior tarsi bearded, L.R. 1.25. Wing8 unmarked, anal lobe well formed, posterior fork almost a t level of cross vein. Halteres black. Abdomen black with white hairs ; hypopygium (fig. lli) with reduced appendages and simple styles.

Holotype male, Berg River, Piquetberg, 18. xii. 52. Paratypes : same locality, 1 $,27 .iii.53 ; 2 $, Sout River Dam, nr. Matroosberg Sta., 7 .xii.52 ; 2 $, Tulbagh Barrage, 23.x.53.

Thorax completely black with some pruinosity.

Chironomus (Cryptochironomus) stilifer sp. n. Easily distinguished from related species such as C. uegyptius Kieffer by the male

hypopygium, otherwise quite similar. Mule.-Wing length 1.5 mm. Head green, palpi brownish, antennae reddish brown, A.R. 1-5. Thwm green, scubl

stripes separate and brown, postnotum and sternopleuron brown. Legs yellowish green, anterior tarsi and apex of tibiae browner, L.R. 1.6; apical tarsal segment of all legs flattened, pulvilli broad. Wings clear, posterior fork distal to cross vein, halteres pale. Abdomen p e n ; hypopygium (fig. l l g ) with long narrow anal point bearing a ventral process with hairs, appearing from above aa a swelling near t,he middle, appendage 1 fairly

from Western Cape Province-I V 177

long, n m w and curved, appendage 2 absent but there is a short and pad-like appendage near anal point ; style long and with a well developed inner process and at the apex with a membranous expansion.

Feemale.-Resembles male ; antenna six-segmented, segments 3-5 without necks, moniliform, sixth equal to 3-5 together.

Holotype male and paratypes 1 d, 8 9, Berg River, Piquetberg, 28.i.53 ; 1 3, Little Princess Vlei, 28. iv. 53.

Chironomus (Cryptochironomus) reductus sp. n. A small green species with yellowish thoracic stripes, wings without anal lobe, A.R.

only about 1, front legs brown, only one coxite appendage present, anal point long. Dis- tinguished from species such as C. gruminiwlor Kieffer by the pale thoracic stripes and long anal point.

Mule.-Wing length 1.25 mm. Head greenish, mouthparts and antennae yellowish brown, A.R. only about 1.0. Thorax

green, scutal stripes separate, brown, postnotum blacker, sternopleuron brown. Legs brown, front legs darker than others, L.R. 2.2. Wings with a slight brownish tinge, posterior fork well distal to cross vein, anal lobe quite absent ; halteres green. Abdomen green, hypopygium (fig. l l h ) with long anal point, one coxite appendage developed, styles and coxites fused.

Female.-Very similar to male but thoracic markings darker, last antenna1 segment dark, equal to 4-5 together.

Holotype male, Berg River, Piquetberg, 30. iv. 53. Paratypes : 2 3, Berg River, Piquetberg, 27.iii.53; 1 6, Berg River, Wellington, ll.ii.53, 1 9, 17. xii. 53 ; 1 3, Berg River, Cecilia’s Drift, 17. xii .53.

Chironomus (Cryptochironomus) atrofasciatus sp. n. Green with black thoracic markings and anterior tibiae and tarsi ; hypopygium lacking

coxite appendages ; separated from similar species such as C. nudiforcep Kieffer by the black markings.

Mule.-Wing length 2.0 mm. Head dark brown, frons green, mouthparts and scape black, flagellum brown, plumes

whitish, A.R. about 3.0. Thorax green, pruinose; scutal stripes, which are separate, postnotum, sternopleuron and a spot below the wing, black. Legs green, anterior tibiae and tarsi entirely blackish, no tarsal beard, L.R. 1.6. Wings normal, anal lobe prominent, halteres green. Abdomen uniformly green, hypopygium (fig. l l i ) completely lacking coxite appendages, styles rather blunt ended, fused to coxites.

Holotype male, Berg River, Piquetberg, 27. iii. 53.

Polypedilum fuscum sp. n. A medium-sized dark species with pruinose markings on thorax ; wings without distinct

markings, tibiae and tarsi yellowish, hypopygium very similar to that of P . swtti Freeman. Mule.-Wing length 2.5 mm. Head, mouthparts and antennae dark brown, A.R. about 1.0. Thorax dark brown

with pruinosity which changes with the direction of the light, acrostichal and dorso-central bristles long. Legs mainly yellowish with darker hairs, femora rather browner ; anterior tibia with pointed “ scale,’’ L.R. 1.8, no tarsal beard. Wings without distinct spots but veins seamed with grey and there is a longitudinal grey shadow just discernible in cell R,, posterior fork well distal to cross vein. Halteres with black knobs and yellow stems.

178 Mr. Paul Freeman on Chironotnidae (Diptera)

Abdomen very dark brown ; hypopygium extremely similar to P . scotti Freeman but styles rather narrower mid more parallel-sided.

Holotype male and 2 3 paratypes, Hermanus Waterfall, 13. xii. 52.

Polypedilum brunneum sp. n. A small uniformly brown species, distinguished from P . scotti Freeman by the low A.R.,

Muk.-Wing length 1.5 mm. dark halteres and different proportions of hypopygial structures.

FIG. 12.-(a) Wing of Polypedilum brevistilum. (b)-(g) Male hypopygia . (b) Polypedilum brevistilum ; (c) P . pruina ; (d) P . brunneum ; (e) Tanytarsus aterrimua ; (f) T . reductus ; (g) T . linearis.

Head, antennae and palpi brown, mouthparts slightly paler, A.R. only about 0.5. Thorax uniformly brown except for a yellowish tinge around the wing bases, acrostichal and dorso-central bristles long. Wings slightly greyish, R2+3 ending quite close to R,, posterior fork well distal to cross vein. Halteres with brown knobs. Abdomen uniformly brown; hypopygium (fig. 124 with long anal point, styles narrower than in scotti, appendage 2 shorter than anal point.

Legs uniformly brown, L.R. about 1.6.

Holotype male and 6 paratypes, Hermanus Waterfall, 13. xii. 52.

Polypedilum brevistilum sp. n. A fairly large species for the genus, rather similar to P . altiwla Kieffer but readily

distinguished by the different wing pattern, especially the much smaller size of the spot in the base of cell R, (in alticola this fills the basal third of the cell).

from Western Cape Province-IV 179

Mule.-Wing length 2.5-2.75 mm. Head and antennae brown, palpi black, A.R. about 2. Thorax mottled brown, quite

heavily pruinose, dorso-central and acrostichal bristles well developed and yellow. Legs mainly pale yellow, femora dark except for the apices which are pale ; tarsi darkened at the joints, L.R. 1.25. Wings with markings and venation as in fig. 12a ; halteres with dark knobs. Abdomen blackish, paler laterally especially in the holotype in which this part is almost yellow, all hairs pale. Hypopygium (fig. 12b) similar to several other species but styles swollen and appeaz shortened.

Female.Similar to male.

Holotype male, W. Cape Province, Berg River, Tulbagh Barrage, 12.xi.53 (IT. M . F. Scott). Paratypes : Belgian Congo, Elisabethville : 1 8, xi. 1933 (C. Seydel) (in British Museum) ; 5 8, 6 9, 15-24. xii. 1938, 1 8, 15. iii. 1939 and 1 8, 1B.iv.1939 (J. H. Bredo) (in Institut Royal des Sciences Naturelles de Belgique).

Polypedilum pruina sp. n. A small species with spotted wings, grey pruinose bands on mesonotum and yellowish

Wing pattern not unlike P. niveiforcqs Kieffer and P. longicrus Kieffer but there is legs. no basal spot in cell M and the male hypopygium is quite distinctive.

Nuk.-Wing length 1.5 mm. Head and scape dark brown, mouthparts and flagellum slightly paler, A.R. about 1.0.

T h u z dark brown, lines of dorso-central and acrostichal bristles pruinose when lighted from the front, pruinosity changes to the stripes when direction of light changes. Legs yellowish, basal two-thirds of femora dark brown, L.R. about 1.7, no tarsal beard. Wings with brown spots as follows : cell R6 with three, one filling the base, one across the middle, and a smaller diagonal one at the apex ; cell M with a narrow t r w t running along M,,, h m its base to just beyond midway, and with a triangular spot in the apical angle ; a spot near apex of fork cell ; a large spot across Cu, ; a double spot in the middle of the anal cell and a small tract just above An. Abdomen blackish with pale hairs, hypopygium (fig. 1%) with trilobed anal point, central lobe expanded, appendage 1 with two long hairs subapically, styles narrow with a few long hairs on inner side.

Halteres with brown knobs.

Female.-Very similar to male.

Holotype male, Rondebosch, xii. 52 ; paratypes, Berg River, Piquetberg, 1 9, i.53, 16, 16.iii.53.

Tanytarsus (Tanytarsus) aterrimus sp. n. A fairly large species for the genus, body entirely black. It falls into Edwards’ Group D,

Frontal tubercles absent, L.R. 2.0, pulvilli Series 1, of his subgenus Tanytursus 8. str. absent, anal point of male with row of dots.

Mule.-Wing length 2.0-2.5 mm. Head, mouthparts and antennae black, frontal tubercles absent, eyes bare, A.R. 0.9.

T h w black, stripes fused, mesonotum with some pruinosity. Legs brown, pulvilli absent, L.R. 2.0, combs of posterior tibiae distinctly separated, each with a spur. Wimgs normal for the group, with numerous hairs in the posterior fork, a central row along half of the basal cell and a few in An. Halteres brown. Abdomen black ; hypopygium (fig. 12e) with narrow styles, appendage 1 broad, la narrow and pointed, 2a with simple hairs, anal point with an irregular row of dots varying in number from 4-16.

Female.--Resembles male; antennae with five segments, the last two being fused, wings rather more hairy.

180 Mr. Paul Freeman on Chironomidae (Dipteru)

Holotype male, and paratypes, 22 $, 1 9, Berg River, Assegaibos Gate 14.viii. 53 ; 2 9, Berg River, Assegaibos Stream, 14.viii.53 ; 5 3, 2 9, Berg River, Driefontein, i-ii.53 ; 1 $, 1 9, Tulbagh Barrage, 12. xi.53.

Tanytanus (Cladotanytarsus) reductus sp. n. A tiny greenish species with yellowish scutal stripes, L.R. about 2-4, wings with reduced

macrotrichia aa in T. capiensis Freeman, but front tarsus without beard ; anal point narrow and appendage 1 reduced.

Hale.-Wing length 1-25 mm. Head, mouthparts, antennae pale yellowish, A.R. about 0.75. Thorax very pale with

slightly darker, separate, yellowish scutal stripes, scutellum and sternopleuron also yellow. Legs very pale, L.R. about 2.4, no tarsal beard or pulvilli. Wings with reduced macro- trichia, present only a t extreme apices of cells R, and M, and as a line in apical half of cell R,, vein MI with macrotrichia for about half its length. Abdomen graas green, hypo- pygium (fig. 12f) with narrow anal point and reduced appendage 1, la rather long in comparison.

B’emle.-Resembles male but wings more hairy; macrotrichia reach back nearly to base of cell R,, there is a short line in cell M,, posterior fork is bordered anteriorly, there is a small patch in fork cell, veins M,, Cu and An with macrotrichia.

Holotype male, Berg River, Piquetberg, 5. iii .53. Paratypes : from same locality, 3 $,5 9, i.53; 1 $, 1 9, ii.53; 3 $,3 ?,5.iii.53; 4 $, 16.iii.53; 1 $, 1 9, 30.iv.53 ; 1 $, Berg River, Hermon, 16.v.52 ; 1 $, Berg River, Cecilia’s Drift, 21.i.53.

Tanytarsus (Cladotanytanus) linearis sp. n. A small dark green species, separable from T. cupensis Freeman by its smaller size,

absence of tarsal beard, presence of macrotrichia in cell M4 and anal cell and on veins M, Cu and An ; anal point wide and triangular, appendage 1 broad.

Male.-Wing length 1.2 mm. Head, antennae and mouthparts black, A.R. 075. Thorax with dark green background,

stripes black and more or less separate, postnotum and sternopleuron black. Legs pale brown, L.R. about 1.8, no tarsal beard, pulvilli absent. W@s with macrotrichia present as a patch a t apices of cells R,, M, and M4 and as lines in the centres of cells R, (to the base) and MI (for half the length of vein MI), along each side of pgsterior fork veins nearly to wing base and as a line along An ; in addition there is a line of macrotrichia just inside the posterior margin ; posterior fringe rather long, veins M, Cu and An with macrotrichia. Halteres pale. Abdomen dark green; hypopygium (fig. 129) with broad triangular anal point, fairly broad appendage 1, l a hardly hardly longer than 1, 2 and 2a, and styles normal for the group.

Holotype male and 13 3 paratypes, Platteklip Gorge, 27. i. 53.